MADISON, Wisconsin — Gov. Scott Walker has scheduled a special election in September to fill a vacant southeastern Wisconsin state Assembly seat.

Republican state Rep. Chris Kapenga of Delafield has represented the 99th Assembly District since 2010. He defeated Democrat Sherryll Shaddock in a special election on July 21 to fill a state Senate seat being vacated by Republican Paul Farrow, who resigned to take a job as Waukesha County executive.

Walker issued an executive order on Wednesday setting a special election for the 99th Assembly District for Sept. 29. Nomination papers will be due by Aug. 4 and a primary election will be held Sept. 1 if necessary.

The 99th Assembly District covers part of Waukesha County and leans heavily Republican.